Charles s



(No Model.) I 3 Sheets-Sheet 1.. G. S. YARNELL.

GARVING MACHINE. V No. 530,570. Patented Dec. 11, 1894.

(No Model.) 3 Sheets-Sheet 2. O. S. YARNELL.

GARVING MACHINE.

No. 530,570. Patented-Dec. 11, 1894.

JVE

(No Model.) 3 Sheets-Sheet 3. G. S. YARNELL.

GARVING MACHINE. No. 530,570. Patented Dec. 11, 1894.

-' UNITE-D STATES PATENT" OFFICE.

' CHARLES S. YARNEL'L, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO THE 7 MOORE OARVING MACHINE COMPANY, OF SAME PLACE.

v CARVlNG-MACHINE SPECIFICATION forming part of Letters Patent No. 530,570, dated December 11 1894.

t Application filed April 80, 1 8 94'- Serial No. 509,520- (No model.)

To all whom it may concern..- Be it known that I, CHARLES S. YARNELL, of

. Minneapolisfin the county of Hennepin and State of Minnesota, have invented anew and useful Improvement in Carving-Machines, of which the following is a description, ref- 1 erence being had tothe accompanying drawings, which are a part of this specification. The invention relates to improvements on the carving machine shown and described in Letters Patent No. 452,144, of May 12, 1891,

the object of the invention being to so improve the machine by changes therein and particularly by the additionof mechanism thereto, as to producea machine adapted to boring or drilling one or several pieces of material simultaneously, and to automatically withdrawing the augersor drills, and repeating the boring or drilling processes, con- .tinuously.

The invention consists in the mechanism and its parts, hereinafter described and claimed, or their equivalents. I

In the drawings, Figure 1, is a side elevation of the improved machine, parts being broken away for convenience of illustration. Fig. 2 ,is an elevation of a portion of the mechanism, the view being at a right angle to the view in Fig. 1. Fig. 3, is a top plan view of the machine. Figs. 4, 5, 6, 7, 8 and 9 are details.

In the drawings A is a bracket secured to some permanent structure, on which bracket the carving machine proper is supported. A vertical post B is hinged in a vertical axis on the bracket A. A driving shaft G has its bearings on the bracket A, in the vertical line of the axis of the post B on the bracket. A standard D is hinged in a vertical axis on the bracket by means of the arm D and the vertical countershafts E E have their journal bearings in arms fixed on thepost B. The countershafts E are driven by belts E run- .ning thereon and on the driving shaft 0. A vertical standard or red F, adjacent to the standard D .is mounted, movable vertically on the standard D, by means of the rearwardly projecting frames G, clamped to the rod and to the forwardly projecting toolarms GJK These frames G straddle and pass around -the rear extremities of arms H, fixed on and projecting rearwardly from the standard D. Bearing wheels I interposed between the frames Gand the arms H serve as guides and anti P friction bearings for the parts; also similar bearingwheels I are interposed be tween the standard D and rod F. Vertically disposed. revoluble cutting tools, angers or drills K are mounted vertically in the front extremities of the arms G, and are rotated rapidly by belts L running on the spindles in which the tools are secured and on the counter-shafts E. A guide K is mounted in one of the arms G in line with the tools K. The rod F with the mechanism mounted thereon, is supported and counterbalanced by the weights ,M on the arm N, which arm is pivoted at one extremity in the overturned upper end of the post B, and is connected medially by the flexible strap 0 to the oscillating cated in the lineof the extension of the axis of the standardD. The straps O and O are each provided with a slot Q (Fig. 5) through which a headed pin Q passes which pin is fixed in the segmental extremity of the arm P, thereby attaching the strap to the arm and providing for a slip or lost motion to prevent breakage in case of any accident to the mechanism. A frameR is provided, having a series of tables adapted to support material thereon suitably with reference to the cutting tools and pattern.

For the purpose of boring or drilling this tern and the guide K as desired.

It-will be understoodthat the tools K in the machine hereinbefore described are revolved rapidly by being connected to the driving shaft as described, and that the tools are capable of being carried horizontally and raised and lowered readily by the operator, by raising and lowering the mechanism that machine may be used with or without a patt is mounte on the rod F, and by swinging laterally t e mechanism that is mounted on the standard D.

For the purpose of automatically and intermittingly raising and lowering the mechanism mounted on the rod F, and in which the tools are carried, which mechanism including the rod F may properly be called the tool-carrying frame, and for purposes incidental thereto, other mechanism has been provided as follows: A suitable frame conveniently constructed of the tubular uprights 10, and the arms or brackets 11, 11

in which the uprights are secured, is fixed to the permanent support12. -In this frame a shaft 13 is mounted, which is driven by a belt running on a pulley thereon and on the driving shaft 0, the belt medially running on the idle pulley 14 mounted on the frame, which idle pulley serves also as a guide for the belt. Another belt 15 running on a small pulley on the shaft 13 and also on a pulley on the shaft 16, drives this latter shaft. An adjacent loose pulley on this shaft is adapted for taking the belt 15 when shifted thereto for the purpose of stopping that portion of the mechanism driven by this belt, while the driving shaft 0 continues to rotate. Another shaft 17, also having its bearings in the frame, is provided with a speed pulley, and a belt 18 runs on this speed pulley and on a reversely arranged speed pulley on the shaft 16, whereby the shaft 17 is driven at such reduced or increased rate of speed as is desirable. A crank 19 fixed on the shaft 17 is provided with a wrist adjustable radially, and a pitman 20 connects the wrist through an adjustable sleeve to a rod 21 having bearings and reciprocable vertically in sleeve boxes 22, which sleeve boxes are provided with stocks, adjustable laterally in other sleeves 23, which latter sleeves are secured, adjust able vertically, on the upright 10. An arm 24 in two parts, one of which parts telescopes and is adjustable in the other part, is secured at one extremity to the rod 21, and at the other extremity is provided with a swiveling head 25, the oppositely extending sides of which, straddle respectively the arms 24 and N, and are pivoted thereto by the pins 26, 26. These pins are screw threaded and cone pointed, and turn by their threads through the sides of the head, the cone points entering suitable recesses therefor in the arms 24 and N. This swivel head 25 is in the line of the extension of the axis of the post B,

which is also the axis of the driving shaft;

0. By this construction the connection between the arm 24 and the arm N is at a point where there is no lateral motion of the parts. It will be understood that by this construction, by and through the reciprocating vertical movement of the rod 21 communicated to the tool-carrying frame through the arm N and oscillating arm P, and the gravity of the frame, that an intermitting vertical-movement of the tool-carrying frame is secured, the length of which can be regulated by the adjustment of the wrist pin in the crank 19. Hence with the constant rotation of the tools and the intermitting vertical movement of the frame in which they are carried, it is only necessary for the operator to properly swing the tools laterally to suitably adjust them to a pattern, or by such other gage as may be convenient, to rapidly and successfully bore or drill material under the tools.

It is frequently desirable to lift, or otherwise adjust the tool-carrying frame vertically, when the machine is not running, for the purpose of changing or adjusting the cutting tools in the spindles, and for conveniently raising or adjusting the tool-carrying frame vertically, I extend the shaft 17 to the front of the article-holding frame R, by means of a flexible section, or telescoping universally jointed tumbling or connecting rod 27, the front extremity of which shaft is provided with a hand wheel 28 for conveniently rotating it.

The carving machine is provided with hearing wheels 1 between the frame G and the arm H, as hereinbefore described, which construction is nicely adapted for t sensitive action required in a carving mac ine, but is undesirably sensitive for the machine when used for boring or drilling purposes. To obviate this difficulty by means that can be readily applied to change the machine,l provide a socketed cap 29, having recesses 30', which cap is adapted to fit over the wheel I and its shank, and to project in front thereof and bear movably against the part against which the wheel would otherwise bear.

As this machine is capable of operating with great rapidity, it is important to have some means, by which the angers 0r drills, can under the manipulation of the operator, be quickly and perfectly centered, or placed and held in correct position for the work they do. For this purpse I so mount the guide or follower K in the arm G, that in connection with a suitable patern, (a form of which I illustrate in Fig. 8) the tools will, automatically be exactly centered and held in position, so as to bore or drill perfect holes without any vibrating or jumping laterally. For this purpose the guide K, which may be a short cylindrical rod of steel, is made coneshaped or rounded at its lower extremity, and is inserted vertically and loosely in a screw threaded sleeve 36, which sleeve is adjustable vertically by its thread in the arm G and is locked in position by the nuts 31, 31 turning on the sleeve against the arm on the two sides thereof. A spring 32 coiled about the sleeve 30, bearing at its upper extremity against the nut 31 and at its lower extremity against a collar 33 secured to the guide K, serves to hold the guiding tool yieldingly downwardly lie 'cane chair seat.

- serves for a guard to; the spring,and principally for a convenient handle to be grasped by the hands of theoperator, for controlling the movements of the tool frame. A collar 34 secured adjustably to the guide K rests normally on the top of the sleeve and limits the extent of the travel of the guide downwardly in the arm G. With-every diifer'ent form of articles produced by this machine,

it is desirable to have a corresponding and suitable pattern.

In Fig. 9, I have illustrated a fragment of a pattern used when the machine is operated for boring holes in the frame of an ordinary The nearly rectangular frame of the pattern 35, is provided with a series of conical depressions 36, adapted to receive the lower rounded or conical extremity of the guide K and guide it to the center,

asthe guide is depressed, thus bringing the cutting tools to the exact center or position they should have at the moment of commencing to bore the holes. The adjustment of this guiding tool with reference to the cutting tools, is such that this tool enters the depression and comes to its center bringing the cutting tools to proper position, just before the cutting tools commence to bore, and thereupon as the tool-holding frame continues to move downwardly against the yielding resistanceof the spring 32, the guiding tool K remains centered in a depression 36, while the boring tools go down sufiiciently to do their work. To assist the operator in guiding the follower K to position, an upwardly extendin g flange 37 is fixed on the pattern 35 around near the line of the depressions, so that the guide K may bear against it and be thereby readily and truly moved from one depression to another, or brought to the depression from any proximate locality. In use the pattern is secured firmly but detachably to the article holding frame.

What I claim as my invention, and desire to secure by Letters Patent, is-- l. The combination with the vertically movable tool-carryin g frame of a carving machine, of mechanism for automatically raising the tool-carrying frame intermittingly, comprising a driven shaft (17) a vertically recipro eating rod connected to the shaft by a pitman, an arm fixed on the rod, and means connecting the arm to the tool-carrying frame, whereby the depressing of the rod lifts the frame, substantially as described.

2. In mechanism for lifting the tool-carrying frame of a carving machine, the combination of a driven shaft, (13) a thereto belted and thereby driven shaft, (16) a third shaft belted through speed pulleys to the said second shaft, a crank on said third shaft,averticallyreciprocable rod and a pitman connecting the rod to a wrist pin on the crank, substantially as described.

3. In mechanism for lifting the tool-carrying frame of a carving machine, the combination with a driven shaft (L6) and a shaft (17) driven therefrom by a belt running on speed pulleys thereon, of a vertically reciprocable rod, a pitman connected at one extremity to a sleeve adjustable on the rod and at the other extremity to a wrist pinadjust-w.

able in a crank on said second shaft,substantially as described.

4. The combination with a carving or similar machine, having a. tool-carrying frame movable vertically and counterpoised by weights on a horizontally extending and vertically swinging arm which arm projects through the extension of the axis on which the tool-carrying frame and related parts swing horizontally, of a vertically reciprocativc rod connected to the weight carrying arm at the point therein in the projection of the vertical axis on which the tool-carrying frame swings horizontally, substantially as described.

5. The combination with the vertically movable tool-carrying frame of a carving ma chine, and a vertically reciprocable rod connected thereto, of a shaft connected eccentrically to the reciprocable rod by a pitman, and an extension of the shaft provided with a hand wheel and a medial tumbling-rod section or part connected thereto by universal joints, substantially as described.

6. In a carving machine, the combination with relatively fixed ways, a frame movable on the ways, and anti-friction bearing wheels interposed between the frame and the ways, of a cap. having a recess and thereby fitted on a bearing wheel and its stem, covering the wheel at the front, and bearing movably against the ways, substantially as described.

7. In a machine having a swinging toolcarrying frame supported movable vertically on a counterpoised arm, a vertically reciprocable arm connected to said counterpoised arm, and a swiveled double head pivoted respectively to the counterpoised arm and to the vertically reciprocable arm, substantially as described.

8. In a carving machine, the combination with a vertically movable frame having a plurality of laterally projecting tool-carrying arms and vertically-disposed revoluble cutting tools mounted in some of said arms, of a sleeve adjustable vertically in an arm of said frame, a vertically disposed non-revoluble t'oolguide movable limitedly vertically in the adjustable sleeve and projecting from its arm in the same direction that the cutting tools project from their arms, a collar on the tool-guide, and a spring interposed between the collar on the tool-guide, and the relatively fixed sleeve adapted to project the tool yieldingly toward its work, substantially as described.

9. With a carving or boring machine having one or more cutting tools and a tool-guide in -a. horizontally swinging and vertically pressions in the'pattern in one direction, sub- 0 movable frame, a pattern provided with a. sestantially as described.

ries of cone shaped depressions for centering In testimony whereof I affix my signature in the guide and for bringing and holding the presence of two witnesses.

' cutting tools to their work, and an upwardly CHARLES S YARNELL.

projecting flange on and in addition to the pattern near the line of the depressions Witnesses: adapted to catch and limit the movement of CHARLES G. VAN WERT, the guide-tool so that it cannot pass the de- L. A. OoNDI'r. 

